diff options
Diffstat (limited to 'security/nss/lib/util/secdig.c')
| -rw-r--r-- | security/nss/lib/util/secdig.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/security/nss/lib/util/secdig.c b/security/nss/lib/util/secdig.c new file mode 100644 index 000000000..f4deec54b --- /dev/null +++ b/security/nss/lib/util/secdig.c @@ -0,0 +1,182 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ +#include "secdig.h" + +#include "secoid.h" +#include "secasn1.h" +#include "secerr.h" + +/* + * XXX Want to have a SGN_DecodeDigestInfo, like: + * SGNDigestInfo *SGN_DecodeDigestInfo(SECItem *didata); + * that creates a pool and allocates from it and decodes didata into + * the newly allocated DigestInfo structure. Then fix secvfy.c (it + * will no longer need an arena itself) to call this and then call + * DestroyDigestInfo when it is done, then can remove the old template + * above and keep our new template static and "hidden". + */ + +/* + * XXX It might be nice to combine the following two functions (create + * and encode). I think that is all anybody ever wants to do anyway. + */ + +SECItem * +SGN_EncodeDigestInfo(PLArenaPool *poolp, SECItem *dest, SGNDigestInfo *diginfo) +{ + return SEC_ASN1EncodeItem(poolp, dest, diginfo, sgn_DigestInfoTemplate); +} + +SGNDigestInfo * +SGN_CreateDigestInfo(SECOidTag algorithm, const unsigned char *sig, + unsigned len) +{ + SGNDigestInfo *di; + SECStatus rv; + PLArenaPool *arena; + SECItem *null_param; + SECItem dummy_value; + + switch (algorithm) { + case SEC_OID_MD2: + case SEC_OID_MD5: + case SEC_OID_SHA1: + case SEC_OID_SHA224: + case SEC_OID_SHA256: + case SEC_OID_SHA384: + case SEC_OID_SHA512: + break; + default: + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return NULL; + } + + arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); + if (arena == NULL) { + return NULL; + } + + di = (SGNDigestInfo *)PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo)); + if (di == NULL) { + PORT_FreeArena(arena, PR_FALSE); + return NULL; + } + + di->arena = arena; + + /* + * PKCS #1 specifies that the AlgorithmID must have a NULL parameter + * (as opposed to no parameter at all). + */ + dummy_value.data = NULL; + dummy_value.len = 0; + null_param = SEC_ASN1EncodeItem(NULL, NULL, &dummy_value, SEC_NullTemplate); + if (null_param == NULL) { + goto loser; + } + + rv = SECOID_SetAlgorithmID(arena, &di->digestAlgorithm, algorithm, + null_param); + + SECITEM_FreeItem(null_param, PR_TRUE); + + if (rv != SECSuccess) { + goto loser; + } + + di->digest.data = (unsigned char *)PORT_ArenaAlloc(arena, len); + if (di->digest.data == NULL) { + goto loser; + } + + di->digest.len = len; + PORT_Memcpy(di->digest.data, sig, len); + return di; + +loser: + SGN_DestroyDigestInfo(di); + return NULL; +} + +SGNDigestInfo * +SGN_DecodeDigestInfo(SECItem *didata) +{ + PLArenaPool *arena; + SGNDigestInfo *di; + SECStatus rv = SECFailure; + SECItem diCopy = { siBuffer, NULL, 0 }; + + arena = PORT_NewArena(SEC_ASN1_DEFAULT_ARENA_SIZE); + if (arena == NULL) + return NULL; + + rv = SECITEM_CopyItem(arena, &diCopy, didata); + if (rv != SECSuccess) { + PORT_FreeArena(arena, PR_FALSE); + return NULL; + } + + di = (SGNDigestInfo *)PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo)); + if (di != NULL) { + di->arena = arena; + rv = SEC_QuickDERDecodeItem(arena, di, sgn_DigestInfoTemplate, &diCopy); + } + + if ((di == NULL) || (rv != SECSuccess)) { + PORT_FreeArena(arena, PR_FALSE); + di = NULL; + } + + return di; +} + +void +SGN_DestroyDigestInfo(SGNDigestInfo *di) +{ + if (di && di->arena) { + PORT_FreeArena(di->arena, PR_FALSE); + } + + return; +} + +SECStatus +SGN_CopyDigestInfo(PLArenaPool *poolp, SGNDigestInfo *a, SGNDigestInfo *b) +{ + SECStatus rv; + void *mark; + + if ((poolp == NULL) || (a == NULL) || (b == NULL)) + return SECFailure; + + mark = PORT_ArenaMark(poolp); + a->arena = poolp; + rv = SECOID_CopyAlgorithmID(poolp, &a->digestAlgorithm, + &b->digestAlgorithm); + if (rv == SECSuccess) + rv = SECITEM_CopyItem(poolp, &a->digest, &b->digest); + + if (rv != SECSuccess) { + PORT_ArenaRelease(poolp, mark); + } else { + PORT_ArenaUnmark(poolp, mark); + } + + return rv; +} + +SECComparison +SGN_CompareDigestInfo(SGNDigestInfo *a, SGNDigestInfo *b) +{ + SECComparison rv; + + /* Check signature algorithm's */ + rv = SECOID_CompareAlgorithmID(&a->digestAlgorithm, &b->digestAlgorithm); + if (rv) + return rv; + + /* Compare signature block length's */ + rv = SECITEM_CompareItem(&a->digest, &b->digest); + return rv; +} |